CVE-2019-19416 Explained : Impact and Mitigation

Huawei products may possess a vulnerability in their SIP module resulting in a denial of service (DoS) situation. An external attacker could potentially exploit this weakness by transmitting specifically designed messages to the targeted device. These vulnerabilities stem from inadequate packet verification measures, allowing the attacker to trigger buffer overflow and a dead loop, ultimately causing a DoS condition. The affected products' details can be accessed at https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20200115-01-sip-en.

Understanding CVE-2019-19416

The SIP module of some Huawei products has a denial of service (DoS) vulnerability. A remote attacker could exploit these three vulnerabilities by sending specially crafted messages to the affected device. Due to insufficient verification of packets, successful exploitation could allow the attacker to cause buffer overflow and a dead loop, leading to a DoS condition.

What is CVE-2019-19416?

The CVE-2019-19416 vulnerability refers to a DoS vulnerability in the SIP module of various Huawei products.

The Impact of CVE-2019-19416

The vulnerability could lead to a denial of service (DoS) condition on affected devices.
Attackers could exploit this weakness by sending specially crafted messages, potentially causing buffer overflow and a dead loop.

Technical Details of CVE-2019-19416

Vulnerability Description

The vulnerability lies in the SIP module of Huawei products, allowing for a DoS attack.

Affected Systems and Versions

Various Huawei products are affected, including AR series routers, NGFW modules, IPS modules, and more.

Exploitation Mechanism

Attackers can exploit the vulnerability by sending specially crafted messages to the targeted device, taking advantage of inadequate packet verification.

Mitigation and Prevention

Immediate Steps to Take

Apply patches provided by Huawei to address the vulnerability.
Monitor network traffic for any suspicious activity that could indicate an ongoing attack.

Long-Term Security Practices

Regularly update and patch all software and firmware to prevent vulnerabilities.
Implement network segmentation and access controls to limit the impact of potential attacks.

Patching and Updates

Ensure that all affected Huawei products are updated with the latest security patches to mitigate the risk of exploitation.